I'm guessing you mean... What is the ratio 20:12, in its simplest form?
If this is what you mean then here's the answer:
20:12
÷ by 2
10:6
÷ by 2 again
5:3
5:3 is 20:12 in its simplest form because you can not fit any whole number (integer)
into both 5 and 3; they have no common factor except ' 1 '.
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